Honest Trailers said it best...

Rating: 8/10 (14 January 2014)

...this movie is for the eight-year-old in everyone.
It's not particularly clever, or well-written, and requires a COLOSSAL suspension of disbelief, but I'll be damned if I wasn't entertained by Pacific Rim. I first saw this movie in my college's auditorium with a group of friends as part of Film Club (they wanted to show something fun during the midterm study break), and to be honest, this movie made me very happy. The action scenes and effects are delightfully colorful and violent, and most of the characters were surprisingly interesting and well-developed for a movie like this. Plus, there is something to be said for a film that portrays the Millennial Generation in a positive light for once.
Even though it was written and directed by the same guy as Pan's Labyrinth, DO NOT expect anything profound to come out of Pacific Rim. It's a cheesy action movie, but one that manages to get the audience to look past that and enjoy it in all its over-the-top splendor.